From: Randolph Chung <randolph@tausq.org>
To: Carlos O'Donell <carlos@baldric.uwo.ca>
Cc: parisc-linux@lists.parisc-linux.org
Subject: Re: [parisc-linux] Improving performance of munmap
Date: Thu, 7 Oct 2004 21:16:57 -0700 [thread overview]
Message-ID: <20041008041657.GG14151@tausq.org> (raw)
In-Reply-To: <20041008020343.GN24430@baldric.uwo.ca>
> Is munmap() speed really a big issue? Does userland see the benefits of
> a faster flush_tlb_mm()?
actually i was wrong, the problem is not with flush_tlb_mm(), but with
flush_user_{dcache,icache}_range.
> Perhaps if you call dlclose() *a lot* you might notice.
>
> Or if you create and destroy threads really quickly.
>
> Aside from that, who else in userspace is a big munmap caller?
lots of apps use mmap a lot..... but even if they don't, 0.9 seconds is
a very long time to make somebody wait.
i made some changes to the flush_user_{dcache,icache}_range
implementation and it seems to be better now. will post the patch
tomorrow after some cleanups.
randolph
--
Randolph Chung
Debian GNU/Linux Developer, hppa/ia64 ports
http://www.tausq.org/
_______________________________________________
parisc-linux mailing list
parisc-linux@lists.parisc-linux.org
http://lists.parisc-linux.org/mailman/listinfo/parisc-linux
next prev parent reply other threads:[~2004-10-08 4:16 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-07 23:02 [parisc-linux] Improving performance of munmap Randolph Chung
2004-10-08 2:03 ` Carlos O'Donell
2004-10-08 4:16 ` Randolph Chung [this message]
2004-10-08 16:59 ` Randolph Chung
2004-10-08 17:05 ` Randolph Chung
2004-10-08 17:35 ` Grant Grundler
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20041008041657.GG14151@tausq.org \
--to=randolph@tausq.org \
--cc=carlos@baldric.uwo.ca \
--cc=parisc-linux@lists.parisc-linux.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.